class_docstr: Dataset of penguin tabular data.
  
  From https://www.tensorflow.org/datasets/catalog/penguins.
code: def init_spec(cls) -> lit_types.Spec:
      return {
          "max_examples": lit_types.Integer(
              default=1000, min_val=0, max_val=10_000, required=False
          ),
      }
  
file_path: lit/lit_nlp/examples/datasets/penguin_data.py
imports: from collections.abc import Mapping
  from typing import Optional, Union
  from lit_nlp.api import dataset
  from lit_nlp.api import types
  import tensorflow_datasets
label_desc: Use image node_id 3 for calling the PenguinDataset obj's underlying member method code with example usage: obj.init_spec(cls) and returns: dict